Round Wall Supply Elbow With Hand Shower Bracket, Solid Brass Wall Union With IMPORTANT: Please make sure the drop ear elbow and water supply pipe are both fixed firmly on the wood stud. Installation by Professional contractors or plumbers is Highly Recommended! 1. Aquaiaw wall supply elbow with O-ring flange, is all made of heavy-duty solid brass. Flange is also made of heavy-duty solid brass. This product is called Wall Supply Elbow, actually it is a One-piece design, not elbow plus cover design. 2. For compliance with your in-wall pipes, water supply inlet is 1/2 NPT female connection. The O-Ring flange could move forward and backward by about 0.8 inch. 3. Water outlet is G1/2 male connction for shower hose. Aquaiaw wall supply elbow is integrated with holder for hand shower. 4. Polished chrome surface finishing. Round wall union with bracket for handheld shower head. Any requiry, please send Message to us on Amazon.